go board

cormullion.jl

abstract type Stone end

struct Empty <: Stone end
struct Black <: Stone end
struct White <: Stone end

Base.show(io::IO, ::Black) = print(io, "⚈")
Base.show(io::IO, ::White) = print(io, "⚆")
Base.show(io::IO, ::Empty) = print(io, "·")

mutable struct Board <: AbstractMatrix{Stone}
    array::Matrix{Stone}
end

Base.size(board::Board) = size(board.array)
Base.getindex(board::Board, i) = board.array[i]
Base.IndexStyle(::Board) = IndexLinear()

empty = Empty()
black = Black()
white = White()

createboard(s) = Board(Matrix{Empty}(s, s))

s = 19
b = createboard(s)

b.array[2:12, 1:14] = black

b.array[4:9, 4:10] = white

b

function flip(b) 
    for celln in 1:length(b)
        if b.array[celln] == white
            b.array[celln] = black
        elseif b.array[celln] == black
            b.array[celln] = white
        end    
    end
end

flip(b)

b

createboard(s) = Board(Matrix{Empty}(s, s))

s = 19
b.array = createboard(s)
b.array[8, 8] = white
b